Anu

Anu was the Sumerian supreme god and the god of the sky. Along with his sons (by Ki) Enlil and Enki, he was one of the oldest and most powerful Mesopotamian gods, and his title was "Father of the Gods". He was often hostile to people (at the request of Ishtar he sent to Uruk the heavenly bull and demanded the death of the hero Gilgamesh), but he could also be more passive or inactive. Mesopotamians recognized him as the father of the gods, and his regalia embodied and illustrated his essence of royal power.